gcc -pthread  -Wall -Wextra -Werror=implicit-function-declaration pthread/pthread_attr_getstack.c -o pthread/pthread_attr_getstack -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lxnet -lsocket -latomic
pthread/pthread_attr_getstack.c: In function 'main':
pthread/pthread_attr_getstack.c:24:25: error: 'PTHREAD_STACK_MIN' undeclared (first use in this function)
   24 |         if ( got_size < PTHREAD_STACK_MIN )
      |                         ^~~~~~~~~~~~~~~~~
pthread/pthread_attr_getstack.c:24:25: note: each undeclared identifier is reported only once for each function it appears in